Device for compressing springs.



H.. I. MAcKEEVER. =oEv|cE ron comrnsssma srnmes.

"Patented m. 20,1917;

. APPLICATSON FILED NOV. 21' I916- 246 UNITED srarns PATENT OFFICE.

HAmiY I. MAoKEEVER, or SAN rmmcrsoo', oALIroRNIA.

' DEVICE FOR CGMPRESSING SPRINGS.

Application filed November 27, 1916. Serial No. 133,599. I

To all whom it may concern:

Be it known that I, HARRY I. MAoKEEvnR, a citizen of the United States,and a resident of the cit and county of San Francisco, State ofalifornia, have made a new and useful invention-to wit, Device forCompressing Springs; and I do hereby declare the following to be a full,clear, concise, and

exact description thereof.

The invention is'a device for compressing springs and is particularlydesigned for conveniently compressing and placing the springs around thestems of gas engine valves, to mount the valves, and for compressingsaid springs to remove the spring abutments on the stems in order toremove the valves.

-In this specification and the annexed drawing I illustrate theinvention in the form which I consider the best, but it is to beunderstood that I do not limit myself to such form because the'saidinvention may be embodied in other forms, and it is also to beunderstood that I intend to cover the invention in whatever form it maybe embodied within the scope and spirit, of the claims following thedescription herein.

Referring to the drawing: Figure 1 is a side view of the device shown inthe act of compressing a gas engine valve spring on the valve stem.

' Fig. 2 is an enlarged side view of the device. v

Fig. 3 is a front elevation thereof.

Fig. 4 is a view of the device showing it in the act of compressing andplacing a gas engine valve in position around the valve spring.

Fig. '5 is a detail view of the end of th lowerarm of the device.

The device is formed with a u shaped frame 1 having two arms 2 and 3 andtheir connecting member 4. The .arm 2 has a fork 5 at its extremityadapted to surround a rod such as the stem of a gas engine valve. Abearing 6 is provided at the extremity of the arm 3 in which is slidablymounted a plunger 7, one end 'of' which extends below the arm 3 inalinement with the center of the fork 5. An operating lever 8 is pivotedat 9 to the upper end of the hearing 6 at the-side of the axis of theplunger toward the frame members 4, to which lever the upper end of alink 10 is pivoted at 11.

The plunger 7iis provided with a series of holes 12 which register witha slot 13 in said Specification of Letters Patent.

Patented Nov. 20, 1917.

' quire. On the upper face of the arm' 2 rests a bracket 16 having sideflanges 17 which engage the side faces of said arm and hold the bracketin sliding alinement with the arm. A presser foot 18 is provided on theouter end of said bracket which is'adapted to engage the lower end of aspring or the I spring abutment at said end of the spring.

A screw 19 having a butterfly head 20, extends through a slot 21 in theupper wall of tlwfibracket 16 and screws into the arm 2 so that saidhead engages said upper wall of the bracket, wherchv the bracket isadjnstably secured to said arm. Upon loosening said screw the bracketmay be moved along the arm 2 and the presser foot 18 adjusted to theproper position with relation to the crotch of the fork 5, so that uponsecuring the bracket in such position by the screw, said presser footmay engage the spring abutmen collar on the valve stem and hold. thecrotch of the fork slightly away from the valve stem.

In order to explain the operation of the inventionas clearly as possiblethat part of.

a gas engine including the valve mechanism 96 is illustrated in Figs. 1and 4. in which figures 30 indicates the valve casing of the engine; 31a valve; 32 the Valve stem; 33 the valve spring surrounding the stem; 34the spring abutment collar on the stem abutting the lower end of thespring: 35 the pin extending through the stem for holding the abutmentcollar in position on the rod against the spring; 36 the cam plunger forengaging'the lower end of the valve stem to actuate the valve; and 37the hearing on the engine in which the cam plunger operates. Theoperation of the invention is as fol 'lows When it is desired to removethe valve from its operative position on the engine, the cap inclosingthe opening in the valve casing above the valve is first removed; thedevice is then placed in the position shown in Fig. 1 with the plunger;7v raised by lever 8 and projecting through said valve casing openingand engaging the top of the valve oil word to the side of 31 in thecenter thereof, on 5 surroundveg the lov stem 32 end engegi saidabutment collar engaging the edge oft s: o color 1111f. h the crotch ofthe fork slightly e the valve stem so that crotcn will rub against theand create The lever 8 then sw g down of ng which operation the distancebetween the lever pivot 9 and the l. lr end plnngei pivot 14 increases,which senses the phwejer i to press upon the valve and ni s t e noopposite to the side pivoted, thus locking the plunger in its lowermostposition and the deuce in its spring compressing position with theshutment collar above the pin 35. The pin is then driven out of thevalve stem The level 8 is then lifted which allows the frame it tdescend and the spring 33 to expand The device is then removed and thevalve is removed through the opening in the top of the valve casing.

Considerable diiiiculty has enced in placing the valve spring; inposition owing to the fact that when its length is greater than. thedistance the valve casing and the cam plun r been ing 37. The upper endof the spri must be placed against the lower well oi" t e velve casingto permit the valve stem to sorted therein in which position l end ofthe spring bends outward it past the top of the cam plunger h It is verydifficult to compress the spring and bend it straight by hand to pet theabutment collar in "position on valve stem. The difiicnlty is overcomeIcy In ivent-ion as follows: The upper end the spring 33 is first placedegains he lower wall of the valve casing; the valve stein and valve 31are then introduced on gh the opening in the top of the valve casing endthe valve stem inserted into he the plunger 7 is then introduced throughthe opening in the top of the valve casing against the valve 31 with thelever 8 in raised position; the abutment collar 3% is placed against thelower end otfthe spring; the fork 5 is brought under said collar. and.the presser foot 18 against the edge thereof; the lever 8 is then swungdownward causing the frame 1 to move upward and the fork 5 to compressthe spring until the lower end of the spring, the collar 84C and thefork 5 rest above the top of the coin plunger loser ing, 37 the lowerpart of the frame is then pressed inwardly against the tension of thecurvature of the iowe end of the sprin heie the collar 34+. registerswith farther npwerd and the for-h 5 l nshes tin collar on the valve stemand compresses the hole valve stem in which osition the device end thecoilsi and spring ere. locked. by the lever and link, their connectingpoint Ill. to the left oi the plunger axis; the

gin then driven through the hole in the valve s the colleen underpressure of the spring,

end or the valve stem; the lever 8 k down to itsiowerrnost PGSIEIQHLduring which movement the frame moves g 33 until the collar is sleevethe pin tem and the lever B raised to let down upon the pin. The valveis then properiy mounted and the device is removed.

Having" thus described my invention,-

ivhet l new end desire to secure by frame, s spring en gaging pert onsaid frame,

2, beer on said frame, a plunger reciprocetiv counted in ssid bearing inel1ne-' inent w staid engaging pert; aiever pivoteiy mounted on saidtheirs: and e A golunger,

said lever nod s YE comprising e on seidfrelne, 4 me e plunger reeiprdment w. n otsil conne plunger and said leven. the ccnnetmig point ofsaid lever and link being adopted to such. position when the plungermoved toward. said engaging part hv said lever and link, as to lock saidin said position. Y It-h A. spring compressor comprising a, frame, asyring engaging pert on said. frame, it on said frame, at plungesreciprocstively mono ed, in said hearing in slinemeet with said pert elever pivotsliy mounted on said frame at one side of the axis scidplunger, and a link connecting said plunger and said lever, theconnecting point of said lever and said link being such as to swing tothe side of the pivot of said lever when the plunger is moved to ward.said engeging part by said lever, whereby the plunger is locked in suchpeed tion. i I A spring compressor comprising a frame, spring engagingfork on said tee MAB

n'esser foot adjustably mounted on said rame' adjacent said fork andmeans for reciprocating said plunger. v

6. A spring compressor comprising a frame, a, spring-engaging part onsaid frame, a plunger reciprocatively mounted on said frame in alinementwith said engaging part, a lever pivotally mounted on said frame, a linkpivoted at one end to said lever, said plunger being provided with aplurality of holes and a pin adapted to be I inserted in any of saidholes and to' connect lever, said plunger being provided with aplurality of holes, said bearing being prothe lower end of said link tosaid plunger.

7. 'A spring compressor comprising a frame, a spring engaging A part onsaid frame, a bearing on said frame, a plunger bearmg 1n reciprocativelymounted in said alinement with said engaging part, a lever pivotallymounted on said frame, a link pivotally connected at its upper end tosaid vided with a longitudinal slot with which said holes in the-plungerare ada ted to register, and a through said slot into any ofasaid holesin the plunger and to connect t' e'lower end of said link with saidplunger 8. A spring compressor comprising a U shaped frame, an engagingpart on one arm mounted on the and at its other end to pin'adapted to belnsertedr of said frame, a bearing on the ,other arm I of said frame, aplunger reciprocatively mounted in said bearingin alinement with saidengaging part, and means for recipro diatemember 0 said U-shaped'frame,and

a link connected at one end to said plunger said lever, the connectingpoint of saidlink and lever being adapted to cross the axis-of saidplunger when the plunger is forced down by said lever and link and torest at the side of the plungeraxis opposite the side at which theshaped frame, an engaging part. onI.-one arm lever pivot is located,whereby the plunger is locked in its lower position. I a

In testimony whereof, I have hereunto set my hand at San Franclsco,

20th day of November 1916.

In presence of- JOHN'R. OBER, P. S. PIDWELL.

California, this HARRY I. MAGKEEVER,

